Improvement in circular-saw mills



atleet @twine Letters Patent No. 98,127, dated December 21,1869.

IMPROVEMENT IN lC,IRCN'J'LIAR-SAW MILLS.

The Schedule referred to in these Letters Patent :md making part of the Same.

To all whomt't may concern:

Be it known that I, JOHN TRUNICK, of Muscatine, in the county of Muscatine, and State of Iowa, have invented a new and useful Improvement in Saw-Guides; and I do hereby declare that the following'is a full, clear, and exact description thereof, which will enable others skilled in the art' to make and use the same, reference being had to the accompanyinglr drawings, forming part of this specification. i

This invention relates to an improvement in means for guiding circular saws, and keeping them. to the trueA saw-line, and consists in a certain construction and arrangement ofl parts, as hereinafter more fully described.

In the accompanying drawings- Fignre'l represents a top or plan view.

Figure 2 is a side view. y

Similar letters of reference indicate corresponding parts.

A is the saw-frame.

B is the smv-arbor, or shaft.

C represents the saw.

D represents the saw-gnide.

'lhe guide is connected with the frame, by means of the plate E, to which plate the guide is pivoted, so that it ina-y oscillate or vibrate laterally, as on a ceuire. The guide is forked near its centre, and the cntting-edge ofthe saw runs in the folk.

F F are guide-pins, of wood, or any suitable material, which pass through orifices in the guide, as s cen, and come in contact, or nearly iu contact, with the saw, so as to hold the saw to the truc line, but in such a manuel' that the saw is allowed to give some what, laterally, in either direction, when diverted -by the grain of the wood, by knots, or from any other cause.

The guide extends to the saw-arbor, where its end is'forked, and confined in a. groove in a collar on the arbor, as seen in the drawing.

The arbor is allowed longitudinal play in its bear-n Forward ot' the saw, the guide extends to the adadjusting-screw G. The screw passes through it, as

The screw G is adjusted on the frame, by means of the nuts K K, which work on opposite sides ot' fixed studs, as seen in the drawino.

y From this arrangement, 1t will be seen that when the saw vis varied (from any canse) from the true sawline, it will be brought back again to itstrne position by means .of the. springs H H, operating upon the guides.

While the cutting-point ofthe saw is allowed'a certain degree of .lexibility, it is, by this arrangement, brought back to the true saw-line, so that marketable lumber is produced, when, by the ordinary rigid arbor and guide, it would be spoiled.

Having thus described my invention,

1 claim as new, andv lesire to secure by Letters Patent- The forked guide D, springs H, and screw-guide G, provided with collar and screw-nuts, combined and arranged with tlie saw O and arbor B, as shown and described, and for the purpose specified.

The above specification of my invention signed by me, this day of 1869. y

JOHN TRUNICK.

Mito A. PRUDEN, WILL. MUNDY. 

